When a helicopter is flying, the dynamics vary depending on, for example, speed and position. Hence, a time-invariant linear model cannot describe its properties under all flight conditions. It is therefore desirable to update the linear helicopter model continuously during the flight. In this thesis, two different recursive estimation methods are presented, LMS (Least Mean Square) and adaptation with a Kalman filter. The main purpose of the system estimation is to get a model which can be used for feedback control.

The purpose of my study is to contribute with knowledge about three teachers? view on the possibilities and difficulties to support students with intellectual disabilities insocial interaction.to get answers to my research questions in the analysis I have in my qualitative study used the theory of Fleck's model about thinking styles rooted in a socio-cultural perspective. In the study, I have used semi-structured interviews. My study shows that teacher?s way of thinking affect students' opportunities to practice social interaction. An important finding in the study was that the school management?s attitude, is of great importance for educator?s opportunities to support the students with intellectual disability in social interactions.

The effect of moderate incongruency between a celebrity endorser and an advertised brand is considered in an experiment with celebrities, both congruent and moderately incongruent with the investigated brands. In addition, the influence of possible moderator variables was examined, as well as the potential impact of the celebrities? gender. It was found that an ad exposing a moderately incongruent combination of celebrity and brand generated a more positive result on attitude towards the ad, brand attitude and word of mouth. Furthermore, under some conditions certain moderator variables influenced the relationship between moderate incongruency and responses evoked by the ad..

This thesis will address a problem concerning availability of information systems at an enterprise within the financial sector and its external suppliers, so called trusted third party. The information system resides on the internal network of the enterprise and must be available to both employees of the enterprise and the trusted third party simultaneously. This contradicts the company policy which disallows third parties access to the internal network. The HAVECA-model introduced in this thesis provides a framework of methods, each solving a sub problem identified in the model. The identified methods are hardening, verification, control and assurance, together supplying a method for continuously securing the internal network against a trusted third party.

Digital preservation is a relatively new subject to Swedish archives. Alhough computers have been used for a long time, preservation has been made on paper and stored on shelves. These days a lot of cities in Sweden have investigated how to best secure the digital information for the future through electronic archiving, e-archives. One option is to hand in the information as soon as possible, but to let the producer keep the information ownership yet some time. The idea is to let the producers of the information answer questions and hand out material, since they are more competent on their field.

Rimaster Kisa AB is a member of the Rimaster Group, the corporation was bought from Samhall AB in January 2007. The corporation is producing mechanichs needed by the Rimaster group as well for external costumers. Samhall AB is now functioning as a provider of labor for Rimaster Kisa, as the company is hiring personnel from Samhall AB. The company has earlier have had problems with their lead times being far too long. This has resulted in that the management decided to invest in a new edging press.

Auditing has long existed and it was in 1899 that the first Swedish organization for accountants SRS, Swedish Audit Society, was created and in 1923 that FAR, Association of Chartered Accountants, was formed. It was after the Kreuger crash in the 1930s that authorized auditors had their breakthrough. After the crash the accounting profession has endured fierce criticism when the audit was flawed and it was during this period that authorized auditors became more widespread, the concept was developed independently and the importance of auditor independence became evident.We have in our paper therefore chosen to focus on auditor independence and to make that it requires the independence to relate to something. Therefore we have chosen to focus on the interaction between the auditor and the client. To explain what independence means we have used the analysis model, the expectation gap and communication, and explain what the audit entails and what tasks the auditor has.

Användaracceptans är en viktig del i alla systemutvecklingsprojekt och är också en väldigt lättpåverkad variabel för en lyckad implementering. Därför är det viktigt att ha översikt på sådana faktorer som kan påverka användaracceptansen negativt, en sådan faktor är försening. Denna uppsats belyser sammanhanget mellan hur en försening påverkar användaracceptansen. Genom att låta en undersökningsgrupp genomgå en enkät utformad efter Technology Acceptance Model har jag samlat upp en generaliserad åsikt. Resultaten visar att försening som variabel inte påverkar användaracceptansen för fallstudien..

That many creative workers have uncertain and uneven incomes is well-established, but how or why they make a living is not. This paper examines the elusive value exchanges between creatives, buyers, consumers, and other economic supporters, and offers a model of how creatives make a living. By mapping income statistics of Swedish creatives together with in-depth interviews some patterns emerge. This, combined with Bourdieu's theories of social, cultural and symbolic capital, and Knorr's objects of sociality, forms a basis for a structured model of value exchange. The paper shows how creative workers create economic and non-economic capital (capitalization), how they advertise this capital (signaling), and how they convert between different types of capital (conversion) in order to make a living.

Background: There have been doping usage as far back as as ancient Greece and around the early 1900s started the doping we have today. In 2008 it was 22,000 men aged 15-54 years old who had any kind of experience with doping in Sweden. The problem of doping use are all over the world and to overcome this problem, we need to work across borders.Objectives: The purpose of this study is to investigate whether there is any connection between the use of supplements and attitude to doping. The study is based on the questions: is there any connection between the use of supplements and positive attitude to doping? is there any connection between the use of supplements/doping substances and high training frequency? and is there different use of supplement/doping substances between girls and boys?Method: A survey in form of a cross-sectional study and a waiting room survey was conducted with 63 respondents of whom 57,1% were women.

The aim of this study is to examine whether the two factors SMB and HML in the Fama-French Three Factor Model proxy for default risk. The study is based on companies noted on the Stockholm Stock Exchange between 2003 and 2008. These companies are used to create the factors SMB and HML, as well as a default risk factor we call RMS. In a first set of regressions, we examine the explanatory power of the original Fama-French model on a set of portfolios consisting of Swedish companies of different size and book-to-market ratio. The default risk factor RMS is then added to the original Fama-French model.

No other object is in our constant possession such as the mobile phone. The smartphone has been transformed into a worldwide forum for information-rich exchanges between individuals and companies, by which this rapid access to the smartphone has created and continues to create opportunities in terms of communication. Many researchers of today undertake the challenge of studying the smartphone's role as a marketing channel, and the role of the channel is now undoubtedly central in marketing. However, as the importance of marketing communication increases and despite the fact that survey methods are exceedingly dependent on a channel to fulfill its purpose, namely carry out questionnaires, there has been surprisingly little attention to the study of the channel's role and importance when carrying out surveys. The main purpose of this paper is to investigate whether the choice of a communication channel affects the survey outcome and, if so, further investigate how survey methods differ in terms of consumers' attitude and also their perception of their privacy.

There is a great need to reduce nutrient leaching from arable land into lakes and oceans. By using several different types of models it has previously been possible to describe nutrient losses in a catchment area with a minimum unit of sub-catchment level. At present, it is instead desirable to model a smaller catchment with an opportunity to re-connect the results to the corresponding fields in the catchment. Such models already exist but they are not fully able to properly describe Swedish conditions and land characteristics in our region.With the approach of creating such a model, SLU has developed a project with this work as its first stage. The model is expected to be created under the working name SWE-model which stands for Soil Water Environment and is in this first stage supposed to apply the SOIL model in catchment scale. During the procedure to describe the first step in the process of developing such a model adapted to Swedish conditions and which works in the catchment scale with an area of about 10-30 km2, focus has been set on calculating the transport of water flow from different hydrological response units. Regardless of the processes occurring in the soil after the water has been added, it is assumed that all the water which flows from each simulated unit is drained.In the first step the hydrologic response units were identified based on land use and soil type in the study area. With the help of a script with functions that retrieve and transform data, certain units were chosen for simulation. The script was also created in this project. Finally, the model results were aggregated and summarized for each unique unit, for each sub-catchment, and also for the whole catchment.From the results it is possible to see similarities in the flow dynamics between modeled and measured data. The efficiency coefficient has been calculated to correspond to the mean of the measured values for the whole simulation period. With an automated calibration process the model should be able to perform better. The volume error gives an indication of overestimation from the model..

The agriculture is today in a development that leads to bigger and bigger units in the primary production. To be able to follow this development many companies chooses to cooperate in different ways. The most radical change is when farmers fuses with other farmers and merge into to a big collectively owned operation firm. The reason behind this idea is that the firms achieve the big companies advantages by being complement to each other. The purpose of this essay is to make an economic analysis of two crop production companies who works together in an operation firm.

The control of indoor temperature must be able to handle large time constants and both measureable disturbances like outdoor temperature, and non-measurable disturbances, like waste heat from appliances. Due to cheaper microcontrollers (small computers with designated tasks) with better performance, more advanced and computation-demanding methods for control can be used.In this thesis, Generalized Predictive Control (GPC) has been implemented and tested on a theoretically derived model of a house. GPC states that a model of the system is estimated in every sample, and the control is carried out simultaneously, based on predictions of the model. Disturbances like solar radiation can be estimated and used in the control as well. The control signals are determined by quadratic programming, which makes it possible to consider conditions, for example limitations on the control signals.GPC requires a number of parameters to be defined, like model order and control signal penalty, but is relatively robust for variations in them.